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Worksheetsquiz bee grade 12
Total questions: 21
Worksheet time: 23mins
Hepatitis is a general term for a disease that is caused by:
Viruses
Bacteria
Parasites
All the above
The electrical energy stored in a capacitor is
a. directly proportional to the voltage across the capacitor.
b. inversely proportional to the capacitance of the capacitor.
c. proportional to the square of the voltage across the capacitor.
d. all of the above
Which among the following is not an example of carbohydrate?
Maltose
Fructose
Glycogen
Glycine
1. Use the table to determine which of the following would protect iron best.
Zn
Ag
Pb
Cu
Use the table on the previous page to determine the E0 for the reduction half-reaction that occurs in the cell Zn|Zn2+||Cu2+|Cu
−0.7618 V
−0.3419 V
+.3419 V
+.7618 V
The standard electrode potential, E0, for zinc is −0.76 V. What is the E0 for the zinc oxidation half-reaction?
(a)
What element is extracted by way of the electrolysis of bauxite?
(a)
Mushrooms are/can be:
A. A variety of fungus
B. Fleshy, fruiting bodies of the fungus
C. Grown in small sheds or plots
D. All the above
Excess of amino acids is broken down to form urea in:
Kidney
Liver
Spleen
Rectum
What happens when a rubber rod is rubbed with a piece of fur, giving it a negative charge?
a. Protons are removed from the rod.
b. Electrons are added to the rod.
c. Electrons are added to the fur.
d. The fur is left neutral.
Which of the following blood group is considered as Universal Donor?
A
AB
B
O
Which of the following process that does not involve evolution of CO2?
Combustion
Respiration
Fermentation
Photosynthesis
1. What is the reduction half-reaction for the following redox reaction?
Zn + HgO ® ZnO + Hg
(a)
How does a positive charge move in an electric field in order to gain electrical potential energy?
a. parallel to the electric field
b. perpendicular to the electric field
c. parallel to and in the same direction as the electric field
d. parallel to and in the opposite direction to the electric field
1. An electrochemical cell reacts according to the following equation:
Br2 + Zn ® 2Br– + Zn2+
What is its cell notation?
a. Br–|Br2||Zn|Zn2+
b. Br–|Zn2+||Zn|Br2
c. Zn2+|Zn||Br2|Br–
d. Zn|Zn2+||Br–|Br2
Animals which eat only plants are called:
A. Herbivores
Omnivores
Carnivores
None of the above
A battery is a device that maintains a potential difference between two
a. light bulbs.
terminals
charges
chemicals
1. What is the anode half-reaction for the cell
Cu(s)|Cu2+(aq)||Ag+(aq)|Ag(s)?
Cu(s) ® Cu2+(aq) + 2e–
b. Cu2+(aq) + 2e– ® Cu(s)
c. Ag+(aq) + e– ® Ag(s)
d. Ag(s) ® Ag+(aq) + e–
A repelling force occurs between two charged objects when the charges are of
unlike signs.
like signs.
equal magnitude
unequal magnitude.
In an electroplating cell, a solution of the salt of the plating metal is the (a) .
A capacitor has a capacitance of 3.00 picoFarad. What potential difference would be required to store 18.0 picoCoulomb
4 V
5 V
6 V
9 V
